Yes it would be good for Humar, Hucast and Hunewearl since they have very low ATA. But well even a Hucaseal could have a use of it.
Personally, I don't feel the need to put a v801 on huney (even if it's a PLUS, especially for vol opt first phase) and I max out ATA with Adept + mag. So that would not be an issue to me to use CQB Expertise as 4th unit (cent/battle or v101, Centurion/Ability, Adept and switching between CQB Expertise and Smartlink). I could even think to remove cent/ability to have both smartlink and CQB expertise to avoid switching every time.
As a hunter, I use guns for Falz spinners and last shape, Ob Lily sometime, and in the Tower (mericarol, Ill Gill, Gibble). Plus depending on situation. Which is already a lot to me. I would like to use more true hunter weapons such as dagger type and feel that I am not losing my time (like, feeling that it would just be faster to play with guns...)